The median income of Franklin County residents was an inflation-adjusted $30,400 per year. Franklin County had 20,786 households in 2017, with a population of 49,969.
The county with the highest median resident income in the state was Oldham County. Oldham County's median income was $36,618 per year after adjusting for inflation – $6,218 more than Franklin County. It had 20,465 households in 2017 and a population of 64,633.
McCreary County had the lowest annual resident income among counties in Kentucky, with a median income of only $12,116 per year. That was $18,284 less than the median income in Franklin County at the time. McCreary County had 6,332 households in 2017 and a population of 17,748.
The table below shows the top 100 counties ranked by median annual resident earnings in 2017.
| Rank | County | Earnings per resident ($$$) |
|---|---|---|
| 1 | Oldham County | 36,618 |
| 2 | Boone County | 34,398 |
| 3 | Spencer County | 33,406 |
| 4 | Scott County | 30,919 |
| 5 | Anderson County | 30,465 |
| 6 | Franklin County | 30,400 |
| 7 | Woodford County | 30,243 |
| 8 | Kenton County | 30,228 |
| 9 | Campbell County | 30,167 |
| 10 | Jefferson County | 29,022 |
| 11 | Bullitt County | 28,918 |
| 12 | Nelson County | 28,575 |
| 13 | Shelby County | 28,336 |
| 14 | Meade County | 27,348 |
| 15 | Hardin County | 27,334 |
| 16 | Trimble County | 27,035 |
| 17 | Fayette County | 26,717 |
| 18 | Daviess County | 26,025 |
| 19 | Jessamine County | 26,022 |
| 20 | Clark County | 25,719 |
| 21 | Mercer County | 25,605 |
| 22 | Marshall County | 25,497 |
| 23 | Bourbon County | 25,439 |
| 24 | Hancock County | 25,279 |
| 25 | Christian County | 25,243 |
| 26 | Bracken County | 25,049 |
| 27 | Henry County | 24,803 |
| 28 | Ballard County | 24,719 |
| 29 | McLean County | 24,532 |
| 30 | Trigg County | 24,422 |
| 31 | Henderson County | 24,337 |
| 32 | Pendleton County | 24,245 |
| 33 | Logan County | 24,239 |
| 34 | Greenup County | 24,186 |
| 35 | McCracken County | 24,176 |
| 36 | Mason County | 24,035 |
| 37 | Caldwell County | 24,019 |
| 38 | Hopkins County | 24,017 |
| 39 | Simpson County | 23,911 |
| 40 | Warren County | 23,806 |
| 41 | Garrard County | 23,704 |
| 42 | Gallatin County | 23,519 |
| 43 | Livingston County | 23,472 |
| 44 | Harrison County | 23,455 |
| 45 | Menifee County | 23,413 |
| 46 | Carlisle County | 23,391 |
| 47 | Boyd County | 23,335 |
| 48 | Butler County | 23,059 |
| 49 | Washington County | 22,847 |
| 50 | Grant County | 22,374 |
| 51 | Todd County | 22,166 |
| 52 | Montgomery County | 22,161 |
| 53 | Allen County | 22,145 |
| 54 | Graves County | 22,012 |
| 55 | Fleming County | 21,983 |
| 56 | Boyle County | 21,982 |
| 57 | Union County | 21,877 |
| 58 | Larue County | 21,837 |
| 59 | Lyon County | 21,789 |
| 60 | Marion County | 21,561 |
| 61 | Webster County | 21,498 |
| 62 | Crittenden County | 21,491 |
| 63 | Madison County | 21,467 |
| 64 | Owen County | 21,313 |
| 65 | Breckinridge County | 21,234 |
| 66 | Carroll County | 21,147 |
| 67 | Edmonson County | 21,106 |
| 68 | Hart County | 20,972 |
| 69 | Lincoln County | 20,811 |
| 70 | Robertson County | 20,745 |
| 71 | Barren County | 20,722 |
| 72 | Ohio County | 20,718 |
| 73 | Laurel County | 20,689 |
| 74 | Metcalfe County | 20,637 |
| 75 | Green County | 20,610 |
| 76 | Lawrence County | 20,535 |
| 77 | Bath County | 20,274 |
| 78 | Carter County | 20,218 |
| 79 | Rockcastle County | 20,147 |
| 80 | Calloway County | 20,115 |
| 81 | Jackson County | 20,093 |
| 82 | Grayson County | 20,070 |
| 83 | Muhlenberg County | 19,929 |
| 84 | Nicholas County | 19,865 |
| 85 | Johnson County | 19,797 |
| 86 | Lewis County | 19,667 |
| 87 | Russell County | 19,457 |
| 88 | Powell County | 19,444 |
| 89 | Monroe County | 19,267 |
| 90 | Morgan County | 19,258 |
| 91 | Pike County | 19,245 |
| 92 | Casey County | 19,213 |
| 93 | Perry County | 19,116 |
| 94 | Pulaski County | 19,050 |
| 95 | Taylor County | 18,990 |
| 96 | Cumberland County | 18,931 |
| 97 | Clinton County | 18,836 |
| 98 | Adair County | 18,811 |
| 99 | Wayne County | 18,504 |
| 100 | Magoffin County | 18,360 |
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